wifi: wilc1000: Register wiphy after reading out chipid

Register wiphy after reading out chipid, so the chipid can be
used to determine chip features and not advertise WPA3/SAE
support to userspace on WILC3000. Note that wilc_netdev_cleanup()
will deregister the wiphy in fail path.

Tested-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Tested-on: WILC1000SD 07 SDIO WILC_WIFI_FW_REL_16_1_2
Tested-on: WILC3000 A SDIO WILC_WIFI_FW_REL_16_1_1
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20241004114551.40236-6-marex@denx.de